[PD] raspberry pi user experience

[me.grimm]

i basically just ordered ever cheapo (<30$) usb stereo soundcard there
is on amazon. ill get the uni to pay.

i was having the same issue as katja. no keyboard, wifi, etc with usb speed 1

ill let the group know if any of the usb soundcards i ordered work
with speed 2 (hopefully) or speed 1 if i can find a usb 1.0
keyboard...

cheers
m


On Sun, Jan 27, 2013 at 8:33 AM, Cyrille Henry <ch at chnry.net> wrote:
> i put it in front of everything :
>
> dwc_otg.speed=1 dwc_otg.lpm_enable=0 console=ttyAMA0,115200
> kgdboc=ttyAMA0,115200 console=tty1 root=/dev/mmcblk0p2 rootfstype=ext4
> elevator=deadline rootwait
>
> cheers
> c
>
> Le 27/01/2013 11:42, katja a écrit :
>
>> Hello,
>>
>> Some people seem to have result with setting lower USB speed on the
>> Pi, but when I try this, the Pi doesn't even respond to keyboard
>> anymore. Checking /boot/cmdline.txt with another computer, I'm sure it
>> is not due to a typo. But the order of settings may be important?
>> Could anyone copy the full text of /boot/cmdline.txt for me, if you
>> have keyboard working with lowered USB speed? (I'm not talking about
>> good audio yet).
>>
>> Thanks,
>> Katja
>>
>>
>> On Sat, Jan 26, 2013 at 8:54 PM, Thomas Grill <gr at grrrr.org> wrote:
>>>
>>> Message to self: it seems that one has to wait for updated RPi USB
>>> firmware/drivers to get USB 2.0 audio going.
>>> Obviously the "isochronous transfer mode" as used by audio interfaces is
>>> currently broken.
>>> gr~~~
>>>
>>>
>>> 2013/1/26 Thomas Grill <gr at grrrr.org>
>>>>
>>>>
>>>> Hi all,
>>>> for my USB audio class 2.0 device "Native Instruments Komplete Audio 6"
>>>> i
>>>> can't report such good news.
>>>> There is constant irregular crackling, not only with Pd but also with
>>>> aplay etc. It seems related to USB bandwidth, since turning on and off
>>>> the
>>>> inputs in Pd changes crackling frequency. The dwc_otg.speed setting is
>>>> not
>>>> usable for me, since the device is dependent on USB 2.0 operation.
>>>> Any experiences with USB 2.0 audio devices under ALSA/rpi?
>>>> thanks,
>>>> gr~~~
>>>>
>>>>
>>>> 2013/1/26 Cyrille Henry <ch at chnry.net>
>>>>>
>>>>>
>>>>> hello,
>>>>>
>>>>> I just install raspbian release and update it. then install pd 0.44.1
>>>>> (without any specific optimisation flag)
>>>>>
>>>>> I made the standard optimisation :
>>>>> * - rtprio 99
>>>>> * - memlock 1000000000
>>>>> in /etc/security/limits.conf
>>>>>
>>>>> and
>>>>> dwc_otg.speed=1
>>>>> in /boot/cmdline.txt
>>>>> as suggested by miller
>>>>>
>>>>> I use a uca222 beringher (that cost about 20 or 25€) sound card.
>>>>> trying the test audio and midi, there is no click with 10ms audio
>>>>> buffer
>>>>> (with adc~ enable).
>>>>>
>>>>> this is with usb keyboard / mouse combo plugged and graphical interface
>>>>> (for the system and for pd).
>>>>>
>>>>> without X, audiobuf can be as low as 5ms
>>>>>
>>>>> having a usb keyboard did not change anything for me.
>>>>>
>>>>> i'm very happy
>>>>>
>>>>> cheers
>>>>> c
>>>>>
>>>>> _______________________________________________
>>>>> Pd-list at iem.at mailing list
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>>>>
>>>>
>>>>
>>>>
>>>>
>>>> --
>>>> Thomas Grill
>>>> http://grrrr.org
>>>
>>>
>>>
>>>
>>>
>>> --
>>> Thomas Grill
>>> http://grrrr.org
>>>
>>> _______________________________________________
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>>>
>>
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>
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-- 
____________________
m.e.grimm | m.f.a | ed.m.
megrimm at gmail.com
_________________________________